Tool post for lathes



Jan. 18, 1949. l. H. FANN TOOL POST FOR LATHES I m'entor 2 Sheets-Sheet 1 J/MM H F7wv Attorneys Filed Sept. 20, 1945 Jan. 18, 1949. 1. H. FANN TOOL POST FOR LATHES 2 Sheets-Sheet 2 Filed Sept. 20, 1946 In enz 'r' FZ/v/v Patented Jan. 18, 1949 TOOL POST FOR LATHES Isham H. Fann i wasl ingxton, D. Q.

Application September 20, 1946, Serial No. 698,207

1 Claim.

adapted to be locked easily and quickly against,

turning or twisting relative to the tool carriage of a lathe and providing for easy, quick radial.

and vertical adjustment of a tool holder therein.

Other and subordinate objects also compre hended by my invention, together with the precise nature of my improvements, and the advan tages thereof, will be readily understood when the succeeding description and claim are read with reference to the drawings accompanying and forming part of this specification.

In said drawings:

Figure l is a view in side elevation of my improved tool post in a preferred embodiment thereof,

Figure 2 is a view in plan,

Figure 3 is a view in vertical section taken on the line 3--3 of Figure 2, with the tool post in a tool carriage,

Figure 4 is a similar view in transverse section taken on the line 4-4 of Figure 2, and without said carriage,

Figure 5 is a view in edge elevation of the sleeve,

Figure 6 is a view in side elevation of the stud,

Figure 7 is a view in transverse section taken on the line 'I-'I of Figure 6.

Referring to the drawings by numerals, my tool post, as shown, comprises an inner upright stud I of cylindrical form provided with a concentric, circular, enlarged base end 2 fitted in a circular aperture 3 in a rectangular washer 4 having an undercut internal wall forming an upper edge internal flange 5 thereon overlying the base end 2. The washer 4 is designed to slidably fit in the usual T-slot 8 of a lathe tool carriage I. The stud I is provided with a diametrical, vertical slot 8 therein extending from the base end 2 to within a short distance of the upper end of said stud, and also with an axial threaded socket 9 in its upper end.

A sleeve ID, of substantially oval form in cross section to reduce weight, is fitted downwardly over the stud l, slidably, the side edges being in a common vertical plane with the slot 3. The upper end of the sleeve I0 is formed with an axial, top, reinforcing boss II and an axial, threaded bore l2 therein aligning with the socket 9. A binder screw I3 is threaded through the bore it into the socket 9 with a jam nut I4 thereon for turning against said boss II.. A pair of vertical,

side slots l5 are provided in the opposite side edges of the sleeve Ill and which are of the same width as the slot 8 and adapted to register therewith. These slots I5 and 8 are of the proper width to accommodate therein, with a sliding fit, the usual tool holder bar I6 which is extended through said slots with the usual cutting tool, or bit, I! clamped in its leading end by a set screw [8. The slots l5 have bottoms I9 formed in the arcs of the curvature of the lower edge of the usual rocker bar 20 which is extended through the bottoms of said slots I 5 and through the slot 8 to support the tool holder bar 18. A pair of set screws 2| with Allen type sockets 22 in the upper ends thereof extend downwardly in said sleeve III and into the slots I5 for turning against the upper edge of the tool holder bar I6.

By turning the binder screw l3 downwardly, the sleeve I0 may be clamped to the top of the tool carriage I to bind the washer 4 against the upper side of the T-slot 6 and thereby lock the described post to said tool carriage I against turning or twisting. By turning the set screws 21 downwardly, the tool holder bar I6 may be clamped between the same and the rocker bar 20. The rocker bar 20 is utilized, in the usual well known manner, to adjust the tool holder bar I6 vertically into different angular positions. The set screws 21 may be used to adjust the tool holder bar radially, as will be obvious. By loosening one set screw 2I, only, the tool holder bar is may be removed and replaced. Radial adjustment of said tool holder bar I6 may be accomplished without disturbing the vertical adjustment as established by the rocker bar 20, and vertical adjustment without disturbing the radial adjustment.

The foregoing will, it is believed, suflice to impart a clear understanding of my invention both as regards structure, operation and advantages, and without further explanation.

Manifestly, the invention, as described, is susceptible of modification as regards structural details and combinations of parts, without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claim.

What I claim is:

A tool post for use in a lathe carriage having a T-slot therein comprising a rectangular washer adapted to slidably fit in said slot and provided with an internal undercut wall, a longitudinally slotted stud extending out of said washer and adapted to project upwardly of said carriage, said stud having a base flange fitting in said engage the top of said T-slot, the first-mentioned 10 means comprising a rocker bar extending through said slots below said tool holder bar, and set screws in said sleeve extending into said side slots and bearing against the top of the tool holder bar.

ISHAM H. FANN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 373,878 Bogert Nov. 29, 1887 409,484 Myers Aug. 20, 1889 414,788 Williamson Nov. 12, 1889 455,466 Back July 7, 1891 687,645 Mitchell Nov. 26, 1901 1,193,945 Taylor Aug. 8, 1916 

